In our mission to help fleets save money and grow their business, we believe that our Liters Plus Members are our best Advocates. Get gas and other rewards for talking about Liters Plus! Introduce your friends and family members. Tell us about an interested company you know that can benefit from our Liters Plus Fuel Management System. Once its application is approved and it begins fueling with Liters Plus, your rewards begin as well and increases every time you add new cars/members.